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Sieving precipitation method for hydrogen sulfide gas in sulfur-containing drilling fluid

A technology of hydrogen sulfide and drilling fluid, which is applied in the field of oil drilling, can solve the problems of human safety and inapplicability that are easy to endanger the operator, and achieve the effects of reducing poisoning incidents, improving efficiency, and stabilizing nitrogen

Inactive Publication Date: 2015-05-27
SICHUAN XILIN OIL SUPPLIES EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the petroleum drilling fluid screening equipment in the prior art is not suitable for oil fields with high sulfur content, and is likely to endanger the artificial safety of the operator, and to provide a safe and low-cost hydrogen sulfide in the sulfur-containing drilling fluid Gas sieving method

Method used

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  • Sieving precipitation method for hydrogen sulfide gas in sulfur-containing drilling fluid
  • Sieving precipitation method for hydrogen sulfide gas in sulfur-containing drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method for sieving and separating out hydrogen sulfide gas in the sulfur-containing drilling fluid comprises the following steps:

[0031] (1) The mud enters the airtight box through the feed port, and the mud is screened into recycled slurry and waste particles through the screen in the airtight box; the sieved recycled slurry flows into the collection tank, and the granular waste passes through the spiral chip conveyor out of the closed box;

[0032] (2) Stir the recovered slurry flowing into the collection tank through the stirring device, and during the stirring process, transport the gas to the collection tank through the ventilation channel on the stirring device; the gas charged will recover the hydrogen sulfide gas in the slurry Replaced, the gas mixed with hydrogen sulfide flows out through the outlet pipe at the top of the airtight box;

[0033] (3) The hydrogen sulfide gas in the outflow gas is removed and discharged into the atmosphere or returned to th...

Embodiment 2

[0041] The difference between this embodiment and Embodiment 1 is that the gas charged in the step (2) in this embodiment is an inert gas. At this time, the effluent gas returns to the collection pool after removing the hydrogen sulfide gas.

[0042] Through the above arrangement, the inert gas can be effectively recycled, thereby saving costs, and effectively preventing the operator from contacting the gas, making the operation safer.

Embodiment 3

[0044] The difference between this embodiment and embodiment 1 or 2 is that a gas storage tank is connected to the ventilation channel, and the gas delivered to the collection pool in step (2) is taken from the gas storage tank. The gas in the gas storage tank is delivered to the collection pool through the delivery pump and the check valve.

[0045] Through the setting of the gas storage tank, delivery pump and check valve, it is possible to effectively prevent the gas in the gas storage tank from being well filled into the collection pool due to the high air pressure in the airtight box.

[0046] In order to compare the desulfurization effect of the present invention, the present invention provides a control group, and its specific operation steps are as follows: on the basis of Example 1, the step of stirring the recovered slurry in the collection tank by the stirring device is removed, and simultaneously No inert gas is introduced.

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Abstract

The invention discloses a sieving precipitation method for hydrogen sulfide gas in a sulfur-containing drilling fluid. The sieving precipitation method comprises the following steps: (1) enabling slurry to enter a closed tank through a feeding hole, and sieving the slurry into a recycling serous fluid and waste particles through a sieving net in the closed tank; enabling the sieved recycling serous fluid to enter a collection pool, and discharging the waste particles out of the closed tank through a screw chip conveyor; (2) stirring the recycling serous fluid flowing into the collection pool by a stirring device, and during the stirring process, conveying gas into the collection pool through a gas inlet passage on the stirring device, wherein the inflated gas is used for replacing the hydrogen sulfide gas in the recycling serous fluid, and the gas mixed with hydrogen sulfide flows out through a gas outlet pipe at the top end of the closed tank; (3) discharging the flowing gas into the atmosphere or returning the flowing gas into the collection pool through the gas inlet passage on the stirring device after the hydrogen sulfide gas in the gas is removed. The sieving precipitation method has the advantages of safe operation, environmental protection, cost reduction, good sulfur removal effect and the like.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to drilling fluid processing equipment. Background technique [0002] Oil drilling mud shaker is an important equipment to reduce the solid phase content in drilling fluid. Drilling fluid circulating from the downhole to the surface must first pass through the shale shaker to remove solid particles with large diameters before entering the desander or desilter to further reduce the solid content. [0003] When drilling in high-sulfur oil and gas fields, the drilling fluid circulated to the surface contains more hydrogen sulfide. After the drilling fluid reaches the ground, hydrogen sulfide is separated from the drilling fluid, threatening the personal safety of drilling engineers and technicians. The safe and efficient exploration and development of high-sulfur oil and gas fields in drilling fluids is one of the technical problems faced by drilling projects at home and a...

Claims

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Application Information

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IPC IPC(8): E21B21/06B01J19/14
CPCE21B21/067B01J19/14E21B21/066
Inventor 贺昶明
Owner SICHUAN XILIN OIL SUPPLIES EQUIP
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